The future energy systems are intended to help meet the social challenges of climate change, increased energy requirements and the energy demands of a growing world population. It is therefore important to expand renewable energies and Power-to-X technologies, make alternative fuels available, prepare internal combustion engines for alternative fuels and develop alternative energy systems. With this in mind, it is only logical for Rolls-Royce Power Systems to expand its portfolio to include fuel cells and to extend its development activities step by step to various areas of application. The potential of fuel cell technology is convincing, as is hydrogen as a storage medium within an overall energy system. Strong arguments for using and promoting this technology are high reliability, scalability and the ability to use renewable energy sources. Fuel cells could play a key role in zero-carbon data centers.